linux-kernel - [PATCH AUTOSEL 6.10 050/197] wifi: iwlwifi: allow only CN mcc from WRDD

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Message-ID: <20240925115823.1303019-50-sashal@kernel.org>
Date: Wed, 25 Sep 2024 07:51:09 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Anjaneyulu <pagadala.yesu.anjaneyulu@...el.com>,
	Miri Korenblit <miriam.rachel.korenblit@...el.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	kvalo@...nel.org,
	gregory.greenman@...el.com,
	dan.carpenter@...aro.org,
	daniel.gabay@...el.com,
	mukesh.sisodiya@...el.com,
	arnd@...db.de,
	linux-wireless@...r.kernel.org
Subject: [PATCH AUTOSEL 6.10 050/197] wifi: iwlwifi: allow only CN mcc from WRDD

From: Anjaneyulu <pagadala.yesu.anjaneyulu@...el.com>

[ Upstream commit ff5aabe7c2a4a4b089a9ced0cb3d0e284963a7dd ]

Block other mcc expect CN from WRDD ACPI.

Signed-off-by: Anjaneyulu <pagadala.yesu.anjaneyulu@...el.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@...el.com>
Link: https://patch.msgid.link/20240808232017.fe6ea7aa4b39.I86004687a2963fe26f990770aca103e2f5cb1628@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/intel/iwlwifi/fw/acpi.c       | 5 +++++
 drivers/net/wireless/intel/iwlwifi/fw/regulatory.h | 2 ++
 drivers/net/wireless/intel/iwlwifi/fw/uefi.c       | 2 +-
 drivers/net/wireless/intel/iwlwifi/fw/uefi.h       | 2 --
 4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index ba9e656037a20..9b3d3405fb83d 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -356,6 +356,11 @@ int iwl_acpi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)
 	}
 
 	mcc_val = wifi_pkg->package.elements[1].integer.value;
+	if (mcc_val != BIOS_MCC_CHINA) {
+		ret = -EINVAL;
+		IWL_DEBUG_RADIO(fwrt, "ACPI WRDD is supported only for CN\n");
+		goto out_free;
+	}
 
 	mcc[0] = (mcc_val >> 8) & 0xff;
 	mcc[1] = mcc_val & 0xff;
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
index 633c9ad9af841..ecf482647617c 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
@@ -45,6 +45,8 @@
 #define IWL_WTAS_ENABLE_IEC_MSK	0x4
 #define IWL_WTAS_USA_UHB_MSK		BIT(16)
 
+#define BIOS_MCC_CHINA 0x434e
+
 /*
  * The profile for revision 2 is a superset of revision 1, which is in
  * turn a superset of revision 0.  So we can store all revisions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index fb982d4fe8510..2cf878f237ac6 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -638,7 +638,7 @@ int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)
 		goto out;
 	}
 
-	if (data->mcc != UEFI_MCC_CHINA) {
+	if (data->mcc != BIOS_MCC_CHINA) {
 		ret = -EINVAL;
 		IWL_DEBUG_RADIO(fwrt, "UEFI WRDD is supported only for CN\n");
 		goto out;
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
index 1f8884ca8997c..e0ef981cd8f28 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
@@ -149,8 +149,6 @@ struct uefi_cnv_var_splc {
 	u32 default_pwr_limit;
 } __packed;
 
-#define UEFI_MCC_CHINA 0x434e
-
 /* struct uefi_cnv_var_wrdd - WRDD table as defined in UEFI
  * @revision: the revision of the table
  * @mcc: country identifier as defined in ISO/IEC 3166-1 Alpha 2 code
-- 
2.43.0